tests/emacs: reorganize darwin and linux

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

tests/modules/services/emacs/darwin/basic.nix

@@ -0,0 +1,28 @@
+{ lib, pkgs, ... }:
+
+{
+  nixpkgs.overlays = [
+    (self: super: rec {
+      emacs = pkgs.writeShellScriptBin "dummy-emacs-28.0.5" "" // {
+        outPath = "@emacs@";
+      };
+      emacsPackagesFor =
+        _:
+        lib.makeScope super.newScope (_: {
+          emacsWithPackages = _: emacs;
+        });
+    })
+  ];
+
+  services.emacs = {
+    enable = true;
+  };
+
+  nmt.script = ''
+    serviceFile=LaunchAgents/org.nix-community.home.emacs.plist
+
+    assertFileExists "$serviceFile"
+
+    assertFileContent "$serviceFile" ${./expected-agent.plist}
+  '';
+}

tests/modules/services/emacs/darwin/default.nix

@@ -0,0 +1,3 @@
+{
+  emacs-service-basic = ./basic.nix;
+}

tests/modules/services/emacs/darwin/expected-agent.plist

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>KeepAlive</key>
+	<dict>
+		<key>Crashed</key>
+		<true/>
+		<key>SuccessfulExit</key>
+		<false/>
+	</dict>
+	<key>Label</key>
+	<string>org.nix-community.home.emacs</string>
+	<key>ProgramArguments</key>
+	<array>
+		<string>@emacs@/bin/emacs</string>
+		<string>--fg-daemon</string>
+	</array>
+	<key>RunAtLoad</key>
+	<true/>
+</dict>
+</plist>